World Retina Day: Seeing a dark curtain or shadow in your vision?

A dark shadow that seems to move across the field of vision can feel like a strange visual glitch. It may be tempting to blame tired eyes, long screen hours or a poor night’s sleep. But when that “curtain” appears suddenly, the eye may be sending an urgent warning.World Retina Day, observed on the last Sunday of September, highlights the importance of recognising retinal problems early. One symptom deserves particular attention: a sudden curtain-like shadow or dark patch in the vision.When a shadow is more than an eye strain“Every so often, a patient describes something that sounds almost too strange to be real.